JOOLA HC-40 Ball Yellow 100 Pack The JOOLA HC-40 hardcourt pickleball is engineered for precision and consistency. Featuring a patent-pending hole placement pattern and a proprietary polymer blend that enhances durability, shape retention, and overall roundness, JOOLA’s engineers found the sweet spot for equidistant hole spacing, maximizing flight consistency and eliminating unpredictable wobble. As JOOLA engineers say, it’s “considered to have a true bounce.” You’ll feel the difference from the first hit.